<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div id="app">{{msg}}</div>
</body>
<script src="./js/vue.js"></script>
<script>
  //声明式渲染
  var vm = new Vue({
      el:"#app",
      data:{
          msg:"hello vue"
      }
  })
</script>
</html>